Checking Components And Wiring

Check the signal cable between control module terminal #A23 (#A23) and boost pressure sensor terminal #4. Check for a short-circuit to ground.

HINT: With the ignition on and the boost pressure sensor connector disconnected, the voltage between terminal #4 and the ground terminal should be approximately 5 V. 

If no errors are found and the fault is permanent, replace the boost pressure sensor.

Remedy as necessary.

Other information: 

• To connect the breakout box / access the control module, see CONNECTING THE BREAKOUT BOX
• For B5xx4T, see TEMPERATURE AND PRESSURE SENSORS, REPLACING
• For B6xx4T, see TEMPERATURE AND PRESSURE SENSORS, REPLACING
• For 5 cylinder turbocharged engines -2004, see SIGNAL DESCRIPTION
• For 5 cylinder turbocharged engines 2005-, see SIGNAL SPECIFICATION .
• For 6 cylinder engines -2004, see SIGNAL SPECIFICATION
• For 6 cylinder engines 2005-, see SIGNAL SPECIFICATION .
• see CHECKING WIRING AND TERMINALS .

Fig 2: Identifying 4-Bit Connector

Courtesy of VOLVO CARS CORPORATION

Fig 3: Identifying Ohm Meter

Courtesy of VOLVO CARS CORPORATION

Fig 4: Identifying Boost Pressure Sensor

Courtesy of VOLVO CARS CORPORATION

Refer to VERIFICATION